『Retaliatory Tickling Training for the Petite Senior!』 The swim club's senior seems unusually down. Worried that her times aren't improving, she laments, "I'm just... declining." Her junior understands her feelings and suggests, "Then how about some [special training]?" As a gesture of gratitude, the junior decides to give the senior some [training] in return. It's purely out of appreciation. Really. However, the senior is extremely ticklish—she struggles even to raise her arms. Even when lowering the intensity or changing spots, she writhes with laughter, repeatedly crying, "Wait, wait, wait!" Attempts to train her using various methods—like tickling her spine—prove ineffective. To help her, a dedicated abdominal training suspension device is finally set up! The training begins, targeting her defenseless soles and helpless upper body with relentless tickling. Her desperate attempts to endure, unable to reach her feet, create a deeply S-inducing scene. The session culminates in an intense, lotion-covered foot-focused tickling finale! For those who enjoy watching a bold yet fragile school swimsuit beauty struggle desperately to endure, this will be a satisfying experience from start to finish!